I think it’s interesting that God / YHWH tells no one how to do their jobs except for the Levites and priests. Everyone has free reign to choose the job / position / role that they want to play. They could choose to herd sheep, be an artisan, run a shop, take care of kids, teach, whatever. But not the Levites. They were not just set aside as holy, they were set aside with a purpose.
Not only did the Levites have to serve the priests, temple, and God / YHWH, but they also each had their own tasks depending on their families. The Kohathites for instance, were in charge of moving and caring for the most holy things. Even in this, the Kohathites were not allowed to see the most holy objects. It was the duty of the priests to cover the objects such as the alter, the lampstands, and the ark of the testimony.
Next the Gershonites were responsible for the coverings and hangings of the tabernacle. They were responsible to take care of the screens for the doorways, the hangings of the court, and the covering of the tabernacle.
Then finally, the Merarites were responsible for the frame of the tabernacle. They took care of the pillars, the boards, the bars, etc. They were responsible for the very skeleton, the frame of the tabernacle. If they did not do their jobs right, the whole of the structure would fall down upon them.
Does God give us duties, or simply roles. Does He direct our every step, or are we responsible enough to seek the Lord and all He is and allow obedience to His overall calling guide us?